Expressive morphing for interactive performance of musical scores

The fruition of musical score by means of multimedia systems requires suitable model for automatic or interactive expressive music performance. In this work we present a method for controlling the mutable musical expressiveness in an abstract way, not necessarily working directly on the acoustic parameters. Our approach integrates symbolic and audio processing in a real-time networked environment. We present a mapping strategy allowing to controlling and varying the expressiveness in a coherent way, by means of an abstract "control space". All the variations computed by the model on the symbolic representation are successively managed by the signal processing sub-system which coherently transforms the sound by combination of different audio effects. The signal processing engine works in real time to render the desired expressive audio variations. The model is used interactively in a web-based environment. The user controls the expressive character of the performance by moving within an appropriate control space.